Food-chopper.



M. A. ROLLMAN. FOOD CHOPPER.

APPLICATION FILED JAN. 24, 1914.

1,132,035. Patented Mar. 16, 1915.

T EH1.

MICHAEL A. EOLLMAN, OF MOUNT JOY, PENNSYLVANIA.

FOOD-CHOPPER.

Specification of Letters Patent.

Patented Mar. 1e, rare.

I Application filed. January 24, 1914. Serial No. 814,128.

To all whom it may concern:

Be it known that 1, MICHAEL A. ROLLMAN, of Mount Joy, county of Lancaster, and State of Pennsylvania, have invented certain new and useful Improvements in Food- Choppers, of which the following is a spectfication.

This invention relates to food choppers such as are used for grinding up meat, vegetables, etc., and one of the objects of the invention is to provide what is known as a solid hopper chopper with a suitable worm and a special crank for turning said worm.

Another object of the invention is to provide a combined hopper and crank so that the separable parts of the chopper are reduced to a minimum.

A further object of the invention is to provide an improved worm and cutters, whereby the latter are rendered self-sharpening.

Other objects are to provide a practlcal, efficient and durable food chopper.

These being among the objects of the invention, the same consists of certain features of construction and combinations of parts to be hereinafter described and then claimed with reference to the accompanying drawings showing a suitable embodiment of the invention, and in which Figure 1 is a vertical central section of my improved food chopper, parts being broken away; Fig. 2 is a transverse section on the line 22, Fig. 1, the worm being omltted; Fig. 3 is a transverse section on the line 3-3 Fig. 1, showing the inner cutter-plate and the preferred means for fixing it in position; Fig. 4 is a detail perspective view of the hub or journal portion of the inner end of the operating crank; and Fig. 5 is an enlarged broken sectional View of the pair of cutter-plates.

Referring to the drawings, the frame 10 may be of any suitable construction, preferablv in the form of an upright provided with any well-known or suitable means for securing the chopper to a support, the'said upright being broken away in the drawings. At the upper end of the upright or frame 10 is a casing 11, 12, which is divided longitudinally and comprises the semi-tubular member 11 preferably cast integrally with the frame 10, and a second semi-tubular member 12 preferably secured permanently to the member 11. The hopper 13,14, also comprises two members 13 and 14 respectivelv, said members being respectively cast integrally (and preferably) with the casing members 11 and 12. Means are provided for permanently attaching the members 12 and 14 to the members 11 and 13. To this end a lug or web 15 is cast integrally with the supporting frame 10 and the casing member 11, the same being located in the corner between the said frame and the outlet portion of the casing 11, 12, and a second lug or web 16 is cast integrally with the casing member 12, both of said lugs or webs being secured permanently together by a through and through rivet 17. Further, the upper portions of the hopper and the outlet portions of the casing are connected similarly; that is to say a lug or web 18 is cast integrally with the casing member 11 and the hopper member 13, and a second lug or web 19 connects the casing member 12 with the hopper member 14, and said lugs or webs are permanently connected together by a through and through rivet 20. In this way a so-called solid hopper and casing is provided.

Before the above described members are rlveted or otherwise secured together, the hand-crank 21 is assembled with said parts. Said hand-crank may be of any suitable construction. in so far as the handle portion is concerned. but the inner end of said handcrank around the axis on which the handcrank turns in rotating the worm is provided with a hollow or tubular journal or hub 22, and the inner projecting end thereof is provided with an annular groove or recess 23, providing shoulders at opposite sides of said recess. The walls of the easing members 11, 12. at the inner end of said casing are provided with an opening to receive said journal 22. and said walls at 24 enter or engage in the groove 23 of said journal. The engagement is effectuated before the members of the casing and hopper are riveted together, and in this way the crank forms a combined part therewith, said crank being pivoted to said parts by said journal 22 which has a hearing at 24. It has been stated that said journal or hub is hollow. This provides an axial opening or socket 25 which is preferably irregular in contour. As shown in Fig. 4, the said opening or socket has fiat opposite walls so that ithas a less transverse measurement in one direction than in the other.

The inner wall of the casing 11, 12, is provided with a plurality of inwardly projecting helically arranged ribs 26 which coact with the ribs of the worm 27 for feeding the material. in the chopper to the cutting plates at the outlet end. The inner end of the feed worm 27 is provided with an axial stud 28 slightly smaller in cross-section than that of the opening or socket 25, so that the said stud'may be fitted into said opening, and it is of the same shape in cross section as said opening so that the turning of the hand-crank 21 will cause the feed-worm to turn on its axis. Preferably the helical portion of the feedworm is terminated at the inner end of said worm by an annular shoulder 27". It is obvious that if the opening 25 and the stud 28 are circular in cross-section, a set screw would have to be employed, but under the present invention this is unnecessary, although the same is not restricted to the a taching means shown. It is obvious that the said stud 28 may have a sliding engagement with the walls of the opening or socket 25; At the outlet end of the casing, the cutter plates are arranged, and for cooperating therewith the corresponding end of the feedworm 27 is provided with an axial stud 29 having preferably flattened sides, and beyond said stud an axial screw neck 30. At the outletend' of the casing 11, 12, is a suitable recess or cavity 31, into the bottom of which against the shoulder thereat is inserted a cutting plate 32. Said plate is provided with suitable discharge openings 33, and is secured to said casing against rotation by means of a lug 34: on said cutting plate which is caused to engage with an aperture 34 in one side of the casing. An outer cutter-plate 35 is also seated in said recess 31, against the inner cutter-plate 32, and said plate 35 is provided with suitable openings 36 which are adapted to be moved opposite the openings 33 in the inner plate. Said outer plate 35 is provided with a central opening 37 which also has flattened sides corresponding to the similar sides on the stud 29, so that said outer plate may be slipped over the screw-neck 30 and the walls of its central opening 37 caused to be engaged with the irregular stud 290n the worm. It will be seen that when the worm is turned, the outer cutter-plate 35 will thereby be caused to turn with it. Finally to secure the parts in position, a winged nut 38 is screwed onto the screw stem 30 and brought home against the outer cutter-plate 35. Means such as a lug 34 will hold the demountable parts in position against a separating movement, when the nut 38 is screwed up.

As shown in Figs. 1 and 5, the cutterplates 32 and 35 are dished and the convexity of said plates is presented outwardly,

the inner plate, as it were, nesting within the outer plate, so that the meeting surfaces of'said' plates willrub on each other when the worm is rotated. Said cutter plates being" preferably of steel, it will be seen that the edges of the discharge. openings at (4,2), are formed at substantially right angles, so that they act together in close contact like a pair of shears. In order to provide said convex cutters with such meeting cutting edges as a, b, the dishing of the outer cutter plate is reversed after it has been produced in the same way as the other cutter, by again putting it in the press, so

that its cutting edge 5, which formerly was at the convex side of the said outer plate will finally be located at the concave side.

It is obvious that the invention is sus.

ceptible of modification, as partsimay be omitted, parts added and parts substituted without departingfrom the spirit and scope of the invention.

What I claim as new is 1. In a food chopper, the combination with a casing provided with a bearing, said casing and bearing comprisingv two riveted sections, a worm-operating crank, a: lateral journal on said crank, and means for fixing said journal in said bearing against outward removal from said casing, said journal and fixing means being incorporated with said casing and bearing before said sections are riveted together.

2. In a food-chopper, the combination of a casing, a worm-operating crank, a lateral journal on said crank and an annular tongue and groove connection between said journal and the bearing of said casing for precluding the outward displacement of said journal from said casing, said journaldand casing being permanently assemble 3. In a food-chopper, the combination of a casing, a worm-operating crank, a lateral journal on said crank, and annular shoulders on said journal between which a bearing portion of said casing is received, said casing and bearing portion comprising two riveted sections, whereby said. casing and bearing portion and the said journal are held permanently assembled.

4. In a f00d-ch0pper, the combination of a casing, a feed-worm, cutters fixed at one end of said casing, one of the same being stationary, and furnishing a bearing for one end of said worm, a crank, a lateral journal projection on said crank, means for fixing said journal in a bearing at the other end of said casing, against outward displacement from said casing, and means to secure said worm to said journal, said journal be ing permanently assembled with said bearing.

5. In a food-chopper, the combination of a easing, a feed worm, cutters filled at one end of said casing, one of the same being stationary, and furnishing a bearing for one end of said work, a crank, a lateral j ournal projection on said crank, means for fixing said journal in a bearing at the other end of said casing, against outward displacement from said casing, and an irregular stud on said worm entering and complementary to the irregular recess in said journal and extending through said bearing.

6. In a food-chopper, a casing in combination with a crank pivoted directly to and permanently associated with said cas- In a food-chopper, the combination of a casing, a worm mounted in one end thereof and adapted to be moved toward said end, and cutter-plates at the opposite end of said casing, one fixed to said casing and one to said worm, both being outwardly convexed and having a rubbing and sharpening action against each other, the outer plate consisting of a struck-up plate, originally reversely convexed and having those edges, originally at the convex surface, located at the concave surface.

8. In a food-chopper, the combination of a casing, a worm mounted in one end thereof and adapted to be moved toward said end, and steel cutter-plates at the opposite end of said casing, one fixed to said casing and one to said worm, both being outwardly convexed and provided with discharge openings, the edges of said openingsrespectively at the convex side of the inner cutter and at the concave side of the outer cutter having rectangular contacting shearing corners.

MICHAEL A. ROLLMAN.

Witnesses:

CHAS. G. DE LONG, ANNA M. HERSEY.

copies of this patent may be obtained for five cents each, by addressing the "Commissioner of latents,

Washington, D. 0." 

